Planooraph co



Patented Oct. 14, 1919.

2 SHEETS-SHEET I.

6 WWW 6 7 a w 3 1% y w MW e v i J/k /M 4 7J7 1% co., WASHINGTON. n. c.

L. A. GRIFFIN.

IMPACT ELBOW.

APPLICATION FILED OCT. 31. 1918.

1,318,551. Patented 0ct.14,1919.

2 SHEETS-SHEET 2.

56 mew UN ED TATES. A EN O F some A GRIFFIN, or EvAivsTon, innnrors', ASSIGNOR'ATO AMERICAN STEAM CONVEYOR conronnrroiv, OF CHICAGO, nnnvors, A ooiar'onnrroiv or New YORK.

To all whom it may concern:

Be it known that I, LORNE A. GRIFFIN, a

citizen of the United States, residing at useful: Improvement in Impact-Elbows, of which the following is afull, clear, concise, and exact descriptiomreference belng had to the accompanying drawings, forming a part 1 ter described in which all of the wear liners areinsertible' and withdrawa'ble through a I of this specification.

My invention relates to improvements in impact elbows, and'is especially concerned with elbows'of this type which are used in conduits for conveying ashes or other abrae sive material. In conduits of th1s type, where the ashes or other abrasive materlal are carried under air-or steam pressure,the abraslve action of the material being carried structed is expensive and difiicult to machine into the proper form, itis desirable, first, that these wear liners should be constructed of a minimum amount of material, andseo- 0nd, that they should be disposed so as to most effectively resist the abrasive action of the 'material being conveyedthrough the conduit.

The objects of my invention are:

First: To provide an impact elbow in which the wear liners are disposed so as to.

most eifectively withstand the abrasive acthe discharge bore 12, which, as shown, ex-

tion of the material impacting thereon.

Second: To provide an impact. elbow in which the metal of the wear-llners is so disposed as to resist the abrasive action with the abrasive action upon the latter liner; 1

' Fourth: To provide an elbow of thetype T j I will be designated as the inner and router:

described in which the inner and outer Specification of Letters latent.

parts.

rMrAcr-Emow.

throat liners canbe adjusted relatively to each other so as to form a tight joint between these two liners, the said adjustment being accomplished independently ofthe impact liner.

Patented Oct. 14', 1919 Application filed October 31,1e1e. Serial Nd. 260,433.

Fifth: To provide an impact elbow with 9 novel means for holding the Wear liners in position. f v 7 Sixth: Toprovide an elbow of the characsingle opening. I

Seventh: To provide anelbow in which the, wear liners can be inserted without: disturbing the steam And Eighth: To provide a novel means in an elbow of'the'character described to secure thecover. plates in position.

connections to the elbow Further objects will appear as the descrip- 7 tion progresses, reference being had to the accompanying draw ngs in which:

vFigurel is a side elevation of an impact elbow constructed in accordance with my invention;

Fig. 2' is a central longitudinal section thereof; w a

Figs. 3 and 4 are transverse sections taken on lines 3-3 and H respectively of Fig. 2;

Fig. :5 is an end elevation showing the injector end of the elbow; and

Figs. 6 and 7 are side andend'elevations respectively of the cover for the hand-hole opening;

S'milar reference characters are used in the several o views to designate the same- Referrin-g' to the" drawings, the reference character -10 indicatesjas a whole thetop member of my improved impact elbow,

which isprov-ided with the inlet bore 11 and tend atan angle toeachother. In'the draw ing thifs angle is illustrated as approxle mately a right angle, but it is to be .under.

stood that my invention is applicable to the nrposeof convenience,- thesewearliners throat liners respectively. The wall of the discharge bore is counter bored, as shown at 15, to receive the inner throat liner 13, so that the inner surface of the inner throat liner 13 is substantially flush with the sur face 16 of the elbow.

A wear liner 17, which for the purpose of convenience will be designated as the impact liner because it receives the impact of the material discharged through the inlet. bore, is disposed opposite the inlet bore and is substantially semi-cylindrical in form, as shown in Fig. 3. The side edges of this impact liner are supported by the ledges 18 formed in the opposite walls of the elbow. These ledges are of substantially the same length as the impact liner. The impact liner 17 is thicker than the outer throat liner 1 1, and since the outer faces of these two liners are substantially flush with each other, the inner surface of the impact liner lies in wardly from that of the outer throat liner. By making the impact liner and the outer throat liner separate from each other, and by making the impact liner 17 thicker than the throat liner, I accomplish three valuable results In the first place, since substantially the entire impact of the ashes or other material falls upon the impact plate, this plate wears more rapidly than the outer throat liner, and in time becomes worn through at substantially its central point. It is then necessary to renew the impact liner. If the impact liner and outer throat liner were made in a unitary construction, it would mean that both of these liners would have to be renewed whenever the impact liner became worn through. At this time the portion corresponding to the outer throat liner would very likely be in such condition as to be able to withstand a very much longer period of service. By making the impact liner separate from the outer throat liner, the impact liner can be renewed at any time, and the outer throat liner can be retained until entirely worn through.

A second advantage which results from this construction is that the thickened impact liner acts as a sort of protector to the outer throat liner by reason of the fact that it tends to direct the ashes in a direction parallel with, but out of contact with, the inner surface of the wear liner, and thereby decreases the wear upon this member.

A third advantage which results from making the impact liner separate from the outer throat liner relates to the manufacturing of the elbow. It' is desirable that the adjacent edges of the two throat liners should fit together snugly, in order that there may be no abrasion of the outer walls of the elbow at the point where these two liners meet. If the impact liner and outer throat liner should be made in one piece, it wo ld be impossible to adjust the outer throat liner toward the inner throat liner, and in the event that the latter liner should be slightly under size, or in the event that the counter bore 15 for receiving this liner should be made too large during the manufacturing process, there would be an open space be tween the adjacent edges of the two liners. However, by making the outer throat liner separate from the impact liner, the outer throat liner can be adjusted toward the inner throat liner so as to bring the adjacent sides of these two liners into close contact. The opposite walls of the elbow are provided with ledges 19 (see Fig. 4), which form a continuation of the ledges 18, but are of less width than the latter ledges. The outer corners of the edges of the outer throat liner are rounded ofi, as shown at 20, so as to not rest upon the ledges 19. The walls 21 of the elbow are offset relatively to the walls 22 so as to form the shoulders 18 above referred to. The walls 21 extend outwardly from the ledges 18, and through the outer side of the elbow, thereby forming an opening 23 through which all of the wear liners can be inserted or withdrawn. To do this, the wear liner 13 is first inserted through the opening 23, and properly positioned; the outer throat liner is next brought through the opening 23 and pushed longitudinally of the elbow until its outer end is flush with the discharge end of the elbow, at which time this end of the outer throat liner will abut against the adjacent end of the next section of the conduit. The impact liner 17 is then dropped into position through the opening 23, and rests upon the ledges 18.

The end of the elbow opposite the discharge bore 12 is provided with an opening 24 through which the steam ejector nozzle (not shown) is inserted so as to discharge its jet in the direction of the discharge bore. The opposite sides of the opening 23 are provided with flanges 25, and the opposite sides of the opening 2 1 are provided with flanges 26, all these flanges having bolt holes formed therein, which register with corresponding openings in the cover plates 26 and 27 respectively. Bolts 28 extend through these registering holes and secure the cover plates to the flanges in position to close the openings 23 and 24. By using these outwardly extending flanges in combination with bolts extending therethrough and through the cover, it is possible to se cure the cover plates in position by inserting the bolts in either direction under certain conditions where it would be impossible to insert the bolts in one of these directions, or to place the covers in position above stud bolts projecting from the walls of the elbow.

The cover plate 27 is provided with a plurality of adjustable set screws 29, the inner said discharge bore for supporting the edges ends of which bear against the outer sides of the impact liner and the outer throat liner. By means of thesesetscre'ws, these liners may be firmly held upon their respective seats. The set screw 30 projects through the cover 26 of the opening 24, and its inner end bears against the adjacent end of the impact liner 17. By threading this set screw inwardly, the impact liner 1 and the outer throat liner 14 may be adjusted longitudinally of the elbow so as to bring the'adjacent ends of these two liners into close contact and also to cause the other end of the outer throatliner to form a close. union with the adjacent endof the: con

veyer conduit. The cover 26 is further pro vided with a screw-threaded opening 31 for receiving andsecuringa steam ejector noz The boss 32'extends outwardly fromvonej side of the inlet end of the-elbow and is provided with a handhole which is closed by= the hand-hole cover 33. {This cover is shown in a side and an end elevation in Figst6 and 7 respectively and comprises a curved portion 34 which closestheopening in the wall of the elbow, and a plane portion 35, which closes the openingin the boss*32. In Figs; 6 and 7 the end 36 of the curved portion 34 is shown as extending beyond-the end 37 This is due to the fact that the curvature-of r the inner wall of the elbow is greater adjacent the end 36than the end37. The handhole cover '33 is held in position by means of a small bar 38, the opposite ends of which engage the inner walls of the lugs 39 and 40. The inner walls of these lugs are beveled in opposite directions so as toproduce a camming action upon the ends of the bar 38 to force it inwardly against the b05941 of the" cover.

While I have described the details of the preferred embodiment of my invention, it is to be understood that my invention is not limited to these details, but is capable of other adaptations and modifications within the scope of the appended claims.

Having thus described my invention, what I claim is 1. An impact elbow comprising a body member provided with inlet and discharge bores extending at an angle to each other, substantially semi-cylindrical inner and outer throat liners of substantially the same length disposed in said discharge bore with their outer ends flush with the discharge end of said elbow, a semi-cylindrical impact liner disposed opposite said inlet bore with one end contacting the adjacent end of said outer throat liner and with its inner sure face lying inwardly from the inner surface of said outer throat liner, the said body member being provided with ledges extending substantially parallel with theaxis of also provided with an opening opposite said discharge bore, flanges on opposite sides of said. openings provided with bolt holes, covers for both of said openingsfhaving bolt holes registering with said first-named bolt holes, bolts extending through saidopenings andhole, adjustable means supported by theg cover for; said first-named opening for engaging the outer sides of said impact liner and outer throat liner, to hold said liners against lateral; movement, andmeans carried by'the cover for the other opening for adjusting said impact and outer'throat liners longitudinally of said discharge bore.

2. An iiiipactelbdw comprising a'body,

member provided with inlet and discharge bores extending at an angle to each other, inner and outer throat liners of 'substantially'the same length disposed in said dis-- charge bore, an impact liner disposed opposite said inlet bore with one; end contacting the; adjacent-end of said, outer throat liner, and its inner surface lying inwardly from theinner surface of said I' outer throat liner, ledges formed on the inner: wall of said elbow for'supporting theedges of said impact :liner, the said body member being provided with an opening adjacent the outer sides of said impact liner and said outer throat liner through which all of i said liners are insertible and withdrawable, a cover for said opening,'rmeans for securing said cover a) said elbow, and 7 adjustable means carried by said cover for holding said liners in'proper'position. 7

39An' impact elbow comprising a body member provided with inlet and discharge bores extending at an angle to each other, inner and outer throat liners of substantially the same length disposed in said discharge bore, an impact liner disposed opposite said inlet bore, the inner surface of said impact liner lying inwardly from the inner surface of said outer throat liner, means for supporting the edges of said impact liner, and means for adjusting said outer throat liner transversely of said discharge bore independently of said impact liner.

4. An impact elbow comprising a body member provided with inlet and discharge bores extending at an angle to each other, inner and outer throat liners of substantially the same length disposed in said discharge bore, an impact liner disposed opposite said inlet bore,the inner surface of said impact liner lying inwardly from the inner surface of said outer throat liner, and means 1for supporting the edges of said impact men 5. An impact elbow comprising a body member provided with inlet and discharge bores extending at an angle to each other, inner and outer throat liners of substantially the same length disposed in said dis charge bore, a semi-cylindrical impact liner disposed opposite said inlet bore, the wall of said body member opposite said discharge bore being provided with an open ing, a cover plate for said opening, and means supported by said cover plate for adjusting said impact liner and said outer throat liner longitudinally of said discharge bore.

6. An impact elbow comprising a body member provided with inlet and discharge bores extending at an angle to each other,

inner and outer throat liners disposed in said discharge bore, an impact liner disposed in said body member opposite said inlet bore, and means for adjustin said impact liner transversely of said inlet bore.

7. An impact elbow comprising a body member provided with inlet and discharge bores extending at an angle to each other, an impact liner disposed in said body member opposite said inlet bore, a throat liner disposed in said discharge bore adjacent said impact liner, and means for adjusting said impact liner and throat liner longitudinally of said discharge bore.

8. An impact elbow comprising a body member provided with inlet and discharge bores extending at an angle to each other, an impact liner disposed in said body member opposite said inlet bore, a throat liner disposed in said discharge bore adjacent said impact liner, and means for adjusting said impact liner longitudinally of said discharge bore.

9. An impact elbow comprising a body member provided with inlet and discharge bores extending at an angle to each other, an impact liner located in said body member opposite said inlet bore, and means for adjusting said impact liner transversely of said inlet bore.

10. An impact elbow comprising a body member provided with inlet and discharge bores extending at an angle to each other, a throat liner disposed in said discharge bore, and means for adjusting said throat liner longitudinally of said discharge bore.

11. An impact elbow comprising a body member provided with inlet and discharge bores, and having an opening in one side thereof, a pair of complementary wear liners in one of said bores, a cover for said openings, and means adjustably mounted on said cover for holding said wear liners together.

12. An impact elbow comprising a body member provided with inlet and discharge bores extending at an angle to each other, inner and outer throat liners of substantially the same length, disposed in said dis charge bore, an impact liner disposed opposite said inlet bore, the inner and outer throat liners being arranged to fit accurately at their adjoining edges, and means for supporting the edges of said impact plate.

In witness whereof I hereunto subscribe my name this 9th day of October, A. D. 1918.

LORNE A. GRIFFIN.

Witnesses:

J. MAGEE, M. WARDELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). 0. 

